Upper light issue in x440T

Got x440T around 1.5 months ago and from the day of delivery my headlight and upper is having issues. The passing light and the upper would never work at times and the drl at times would tend to flicker aswell. Went to service centre for the issue and all they did was spray WD40 on it. Anyways my first service is due in some days but i want to know if this is a common issue